initiate_checkout Event

Fires when a visitor starts the checkout process. This event marks the transition from browsing to buying and is critical for checkout funnel analysis.

Shopify: Automatically tracked when customers click the checkout button or land on the checkout page.

JavaScript

window._upstack('track', 'initiate_checkout', {
  items: [
    {
      id: 'SKU_12345',
      name: 'Classic Cotton Tee',
      price: 34.99,
      quantity: 2
    },
    {
      id: 'SKU_67890',
      name: 'Running Socks',
      price: 14.99,
      quantity: 1
    }
  ],
  value: 84.97,
  currency: 'USD'
});

Properties

Property	Type	Required	Description
items	array	Yes	Products in checkout
value	number	Yes	Cart subtotal
currency	string	Yes	ISO 4217 currency code

When to Fire

Checkout button click
Checkout page load
Express checkout initiation (Shop Pay, Apple Pay)

view_cart — Before starting checkout
add_shipping_info — After entering shipping details
add_payment_info — After entering payment details
purchase — When order is completed

add_to_wishlist add_shipping_info

⌘I

SDK

PIXEL EVENTS

IDENTITY

AUTOMATIC TRACKING

initiate_checkout Event

JavaScript

Properties

When to Fire

​JavaScript

​Properties

​When to Fire

​Related Events

JavaScript

Properties

When to Fire

Related Events